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Clarification on submission requirements, is a GitHub repo and staging instance enough?

In the requirements it says:

• Every submission must include a link to the code (such as a Github public repository), and preferrably a staging instance, a video, or a set of screenshots (if they apply) as a demo

My question has to do with parsing the boolean logic on this part:

[ and preferrably a staging instance, a video, or a set of screenshots (if they apply) as a demo ]

Do you have to have all of those items, or is it enough to have a GitHub repo posted and a working instance on for example the Rinkeby test net? I'm hoping it's enough to have the repo and test net instance and that you don't also need to have a video and screenshots too, which are time consuming to make.